Knight stars or amaryllis are popular Christmas bulb flowers. Unfortunately, the plants are mostly treated as disposable items. You can easily put them over the summer and make them bloom again next year.
Amaryllis are actually called knight stars and belong to the botanical genus Hippeastrum. The magnificent onion flowers come from South America. That is why their life cycle is the opposite of that of native plants. Knight stars bloom in winter and dormant in summer. What wintering is for our houseplants, summering is for amaryllis. This is why the onion plant is unspectacular in summer, but by no means dead. With these tips and the right care, you can bring your amaryllis well through the summer.
Summer amaryllis: Here’s how
- After the flowering phase in March, cut off the flower stalks
- Place the amaryllis in a light and warm place, water regularly
- Move the amaryllis to a sheltered place outside in May
- Water and fertilize regularly over the summer
- Waterless from the end of August, stop fertilizing
- The rest phase begins in September
- Cut off dry leaves, do not water
- Place the knight’s star in a cool, dark place
- Repot the amaryllis in November
- Water the onion six weeks before flowering
Do not throw away faded amaryllis
If you take good care of your potted amaryllis over the winter and water it regularly, you can enjoy the grandiose star blossom throughout the entire flowering period until March. If the last bloom on the knight’s star passes, it is not yet over. Initially, Hippeastrum now begins to form more leaves. This is what the plant needs to collect enough energy for the next flowering period. Now cut off the flower stalks at the base, but not the leaves. Then place the knight’s star in a bright spot by the window.
Faded flower stalks can be cut off
How can you summer amaryllis?
Despite their exotic origin, knight stars are not pure indoor plants. As soon as the temperatures get warmer in May and there is no more threat of frost, move the plant to a sheltered place outside. She can spend the summer there. The warmer the location, the better. Avoid the full sun, however, as otherwise, the amaryllis leaves will burn. You can also plant the amaryllis in the bed over the summer. Regularly give the potted knight star water over the saucer during the growth phase between May and August.
Tip: Do not pour amaryllis over the onion, otherwise it could rot. For further care, add some liquid fertilizer to the irrigation water every 14 days. This gives the plant enough energy for the next flowering phase.
After the summer, the rest phase follows in autumn
After the growth phase, Hippeastrum, like all bulb flowers, needs a rest period of at least five weeks. This usually starts in September. From now on the plants will be watered less and after a while, you should stop watering altogether. The leaves of the amaryllis slowly dry up and the plant draws its energy into the bulb. Dead leaves can be cut off. Then put the flower pot inside in a cool, dark place at around 16 degrees Celsius.
Attention: Amaryllis are not frost-hardy and must be cleared from the garden in good time in autumn!
During the resting phase, the amaryllis bulb is neither watered nor fertilized
Repot for new flowers
You can influence the next time the amaryllis blooms. Usually, this is around Christmas time in December. At the beginning of November, the onion is transplanted into a new pot with fresh soil. Put the bulb about halfway in drained house plant soil.
The pot should be just a little bigger than the thickest part of the onion so that it doesn’t fall over. As soon as you start watering the knight’s start again (very little at the beginning!), The plant will start its flowering phase. When the first new shoot appears, the pot is put into the light. Now give more water again. From then on, it takes about six weeks for the first flower to open.
Frequently Asked Questions
When are the amaryllis flowers cut off?
The flower stalks of the amaryllis are cut off as soon as the starflower has dried up.
When can the knight star be put outside?
In May, the amaryllis should be taken out into the fresh air. You can put the potted plant on the balcony or terrace, or plant the bulb in the garden.
When do you stop casting the knight’s star?
During the flowering phase in December and January, you should water the amaryllis over the saucer about once a week. In the growth phase possibly more often. In the resting phase from September, you should stop watering. A watering in November awakens the amaryllis to new life. From the first shoot, regular watering is used again.
When is the knight star fertilized?
Fertilize the amaryllis every 14 days during the growth phase during the summer. In the resting phase from the end of August, there is no more fertilization.
When does the amaryllis bloom after over summer?
In autumn, the knight’s star should rest for at least five weeks to two months. After the first watering at the end of October / beginning of November, it takes about six weeks for the amaryllis to bloom again.